Summative Practice (Question 1 & 2) – Form 5 Science (KSSM) Chapter 4

Question 1:(a) What is meant by chemical reaction?(b) Is the rate of reaction affected by pressure? Explain your answer. Answer:(a) Process where one or more reactants are converted into one or more products. (b) Yes.Pressure affects the reaction for reactants in the gaseous state. Question 2:A student carried out an experiment to study a factor … Read more

Summative Practice (Question 3) – Form 5 Science (KSSM) Chapter 4

Question 3:Digestive enzymes function as biological catalysts to change the rate of decomposition of complex food molecules into simpler molecules in the digestive system. What is the use of digestive enzymes other than aiding in the digestion of food? Figure 2 shows one application of biological catalysts in daily life. (a) Give two examples of … Read more

Formative Practice 4.2 – Form 5 Science (KSSM) Chapter 4

Question 1:State five factors which affect the rate of reaction. Answer:Temperature of reactant, concentration of reactant, size of reactant, catalyst and pressure Question 2:Complete the following statements:(a) The __________ the temperature of reactants, the higher the rate of reaction.(b) The __________ the concentration of reactants, the higher the rate of reaction.(c) The __________ the size … Read more